Unity 3.5 Problems with LightMap

Good Day ... I'm currently working on Unity 3.5.0f5 and yes its Pro . I've faced loads of problems with Unity since the new version and applying LightMaps on its is the worse thing ever so here is my current Problem. After making a light map and everything is alright then when I try to make the lightmap in true color not compressed by disabling the compress button on the lightmap menu in unity .. unity Crashes and then after re-opening it gives me for example " Assets/2/LightmapNear-82.exr was disabled because the asset importer crashed on it last time. you can use 'Assets -> Import Assets' to enable automatic importing again" I tried that but it didnt work, I also tried to copy the project into another computer as it was suggested in one of the forums but it didnt work still doesn't import the light map that I made and its a tedious process. Any Suggestions ? Thanks